Sam Edmonds is good company at high and low latitudes but you'll know that for yourself by the end of the interview, conducted north of Sydney with sulphur crested cockatoo and DeHavilland Canada Beaver accompaniment.

Much has been written on high latitudes food but the residues receive less attention. After finding out about Antarctic sewage and sewerage I now understand why, but having done the yards it's only right that I put the information in your ears.